Kohler LV625

Kohler LV625The Kohler LV625/LV625S is a 624 cc, (38.1 cu·in) V-twin liquid-cooled four-stroke internal combustion gasoline engine from the Aegis series, manufactured by Kohler Co.

The Kohler LV625 engine has an OHV (overhead valve) design, vertical PTO-shaft, pressurized lubrication system with Gerotor oil pump. This engine is equipped with a carburetor with a fixed main jet and electronic ignition system.

It has an 77.0 mm (3.03 in) cylinder bore and 67.0 mm (2.64 in) piston stroke. The compression ratio rating is 8.5:1. This engine produced 20.3 PS (14.9 KW; 20.0 HP) at 3,600 rpm of horsepower and 41.0 Nm (4.2 kg·m; 30.3 ft·lb) at 2,400 rpm of torque.

The breakdown of the engine code is as follows:

  • L – Liquid-cooled
  • V – Vertical PTO shaft
  • 625 – Numerical designation
  • S – Electric start

General information

Engine Specifications
ModelAEGIS LV625 / LV625S
Type4-stroke, OHV, V-twin
Displacement624 cm 3 (38.1 cu-in)
Max. horsepower20.3 PS (14.9 KW; 20.0 HP) at 3,600 rpm
Max. torque41.0 Nm (4.2 kg·m; 30.3 ft·lb) at 2,400 rpm
Fuel systemCarburetor with a fixed main jet
Cooling systemLiquid-cooled
Ignition systemElectronic ignition system
Lubricating systemPressurized lubrication
Starting systemElectric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:8.5:1
Bore x Stroke77.0 X 67.0 mm (3.03 x 2.64 in)
Sleeve internal diameter77.000-77.025 mm (3.0315-3.0325 in)
Piston skirt outer diameter76.967-76.985 mm (3.0302-3.0309 in)
Number of piston rings (compression / oil):2 / 1
Connecting rod small end ID17.015-17.023 mm (0.6699-0.6702 in)
Piston pin outer diameter16.995-17.000 mm (0.6691-0.6693 in)
Side clearance:Top0.040-0.086 mm (0.0016-0.0034 in)
Second0.040-0.086 mm (0.0016-0.0034 in)
Oil0.046-0.196 mm (0.0018-0.0077 in)
Ring end gap:Top0.180-0.380 mm (0.0071-0.0150 in)
Second0.250-0.450 mm (0.0098-0.0177 in)
Crankshaft main journal diameter:40.913-40.935 mm (1.6107-1.6116 in)
Crankpin journal diameter:35.955-35.973 mm (1.4155-1.4163 in)
Cylinder Head
Valve Arrangement:OHV, gear drive
Valves:4 (2 per cylinder)
Valve head diameter:INTAKE33.370-33.630 mm (1.3138-1.324 in)
EXHAUST29.370-29.630 mm (1.1563-1.1665 in)
Stem outer diameter:INTAKE6.982-7.000 mm (0.2749-0.2756 in)
EXHAUST6.970-6.988 mm (0.2744-0.2751 in)

Tightening torque specs

Tightening torque specs
Cylinder head bolt Step 1: 16.9 Nm (1.72 kg·m; 12.47 ft·lb)
Step 2: 33.9 Nm (3.46 kg·m; 25.02 ft·lb)
Flywheel66.4 Nm (6.77 kg·m; 49.0 ft·lb)
Spark plug27 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Oil system
Oil typeAPI SG, SH, SJ, or higher
Recommended oilSAE 10W-30
Oil capacity1.9 L (2.01 US. qt, 1.67 Imp. qt.)
Cooling system
TypePressurized cooling system with integrated belt-driven water pump
Coolant capacity1.4 liters (1.48 US.qts, 1.23 Imp. qts)
Ignition system
Spark plugChampion RC14YC
Spark plug gap0.76 mm (0.030 in)
Ignition module air gap0.2-0.3 mm (0.008-0.012 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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